Relay server and GitLab were down because Redis couldn't save snapshot to disk because the Relay consumed 21GB of RAM
The relay background processing binary, to be precise. Some kind of memory leak.
GitLab server is back, Weblate server is back, Relay is working again (though memory leak needs to be fixed)
Server run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!